A387390
Numbers k such that (28^k + 3^k)/31 is prime.
Original entry on oeis.org
3, 17, 443, 3907, 18911, 50929
Offset: 1
- P. Bourdelais, A Generalized Repunit Conjecture.
- J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
- H. Dubner and T. Granlund, Primes of the Form (b^n+1)/(b+1), J. Integer Sequences, 3 (2000), #P00.2.7.
- H. Lifchitz, Mersenne and Fermat primes field
- Eric Weisstein's World of Mathematics, Repunit.
- OEIS Wiki, Primes of the form (a^n+b^n)/(a+b) and (a^n-b^n)/(a-b)
Cf.
A057187,
A057188,
A062587,
A062589,
A127996,
A127997,
A128344,
A204940,
A217320,
A225807,
A228922,
A229542,
A375161,
A375236,
A377031,
A377856.
A387392
Numbers k such that (29^k + 3^k)/32 is prime.
Original entry on oeis.org
11, 181, 229, 311, 701, 4493, 5233, 13879
Offset: 1
- P. Bourdelais, A Generalized Repunit Conjecture.
- J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
- H. Dubner and T. Granlund, Primes of the Form (b^n+1)/(b+1), J. Integer Sequences, 3 (2000), #P00.2.7.
- H. Lifchitz, Mersenne and Fermat primes field
- Eric Weisstein's World of Mathematics, Repunit.
- OEIS Wiki, Primes of the form (a^n+b^n)/(a+b) and (a^n-b^n)/(a-b)
Cf.
A057187,
A057188,
A062587,
A062589,
A127996,
A127997,
A128344,
A204940,
A217320,
A225807,
A228922,
A229542,
A375161,
A375236,
A377031,
A377856.
A387473
Numbers k such that (31^k + 3^k)/34 is prime.
Original entry on oeis.org
- P. Bourdelais, A Generalized Repunit Conjecture.
- J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
- H. Dubner and T. Granlund, Primes of the Form (b^n+1)/(b+1), J. Integer Sequences, 3 (2000), #P00.2.7.
- H. Lifchitz, Mersenne and Fermat primes field
- Eric Weisstein's World of Mathematics, Repunit.
- OEIS Wiki, Primes of the form (a^n+b^n)/(a+b) and (a^n-b^n)/(a-b)
Cf.
A057187,
A057188,
A062587,
A062589,
A127996,
A127997,
A128344,
A204940,
A217320,
A225807,
A228922,
A229542,
A375161,
A375236,
A377031,
A377856.
A387474
Numbers k such that (32^k + 3^k)/35 is prime.
Original entry on oeis.org
3, 47, 107, 157, 4799, 21841
Offset: 1
- P. Bourdelais, A Generalized Repunit Conjecture.
- J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
- H. Dubner and T. Granlund, Primes of the Form (b^n+1)/(b+1), J. Integer Sequences, 3 (2000), #P00.2.7.
- H. Lifchitz, Mersenne and Fermat primes field
- Eric Weisstein's World of Mathematics, Repunit.
- OEIS Wiki, Primes of the form (a^n+b^n)/(a+b) and (a^n-b^n)/(a-b)
Cf.
A057187,
A057188,
A062587,
A062589,
A127996,
A127997,
A128344,
A204940,
A217320,
A225807,
A228922,
A229542,
A375161,
A375236,
A377031,
A377856.
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